Synthesis of 2-(9-Fluorenyl)acrylic Acid Derivatives via Intramolecular Friedel-Crafts Reaction of Morita-Baylis-Hillman Adducts of 2-Biphenylcarboxaldehydes
作者:Kee-Jung Lee、Hee Lim、Sang-Hoon Ji
DOI:10.1055/s-2007-983812
日期:2007.8
Treatment of propiolic acid esters or N, N-dimethylpropynamide and various 2-biphenylcarboxaldehydes with tetrabutyl-ammonium iodide/zirconium(IV) chloride, titanium(IV) chloride/dimethyl sulfide, or titanium(IV) bromide/dimethyl sulfide or treatment of methyl acrylate and 2-biphenylcarboxaldehydes with 1,4-diazabicyclo[2.2.2]octane (DABCO) and triethanolamine induce an aldol-type reaction to furnish